JPS59179965A - Intermediate anchoring method and tool of unbond steel material - Google Patents
Intermediate anchoring method and tool of unbond steel materialInfo
- Publication number
- JPS59179965A JPS59179965A JP5555883A JP5555883A JPS59179965A JP S59179965 A JPS59179965 A JP S59179965A JP 5555883 A JP5555883 A JP 5555883A JP 5555883 A JP5555883 A JP 5555883A JP S59179965 A JPS59179965 A JP S59179965A
- Authority
- JP
- Japan
- Prior art keywords
- steel material
- slab
- unbonded steel
- unbonded
- formwork
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明はスラブにおけるアンボンド鋼材の中間定着の技
術に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a technique for intermediate fixing of unbonded steel materials in slabs.
アンボンド工法はスラブの大型化、スラブ自軍の低減、
たわみ、ひび割の制御等を目的としてスラブに用いられ
ているが、アンボンド工法の鋼材はコンクリートとの付
着がなく、定着点間の距離も作業性のため６０〜５０ｍ
と長くしているため、設計条件下では前記目的は一応達
成畑れるが、予想外の、集中荷重や大荷重によるたわみ
の増加、それの隣接スパンへの影響、部分的にスラブが
破壊して鋼材が切断した場合の鋼材のすべり等の問題点
がある。The unbonded construction method increases the size of the slab, reduces the size of the slab,
It is used in slabs for the purpose of controlling deflection and cracking, but the unbonded method steel does not adhere to concrete, and the distance between anchoring points is 60 to 50 m for workability.
Although the above objectives can be achieved under the design conditions, there are unexpected increases in deflection due to concentrated loads and large loads, its impact on adjacent spans, and partial slab failure. There are problems such as slipping of the steel material when it is cut.
本発明は、アンボンド工法の特長を生かし、かつ、前記
問題点に対して安全性を高めることができるアンボンド
鋼材の中間定着方法と該方法用の中間定着具を提供する
ことを目的としているものであって、方法発明の構成ト
の特徴は、スラブ型枠内の所望位置に設置した箱状型枠
の内部を除いてスラブコンクリートを打設するとともに
、前記箱状型枠を貫通しているアンボンド鋼材に中間定
着具を取付け、スラブコンクリートの硬化後、アンボン
ド鋼材を緊張してその端部を定着し、それから前記箱状
型枠の内部にコンクリートを充填する点にあり、１だ用
具発明の構成上の特徴は、上縁に開口するＵ形のアンボ
ンド鋼材挿入溝を設けたスペーサ兼用のアンカープレー
トと、該アンカープレートの両側において相対向してア
ンボンド鋼材に取付けられる各１対のコーンとチャック
から成る点である。The present invention aims to provide an intermediate fixing method for unbonded steel materials that takes advantage of the features of the unbonded method and can improve safety against the above-mentioned problems, and an intermediate fixing tool for the method. A feature of the method invention is that slab concrete is poured except for the inside of a box-shaped form installed at a desired position within the slab form, and unbonded concrete is poured through the box-shaped form. An intermediate fixing device is attached to the steel material, and after the slab concrete hardens, the unbonded steel material is tensioned to fix the ends thereof, and then the inside of the box-shaped formwork is filled with concrete. The above feature consists of an anchor plate that also serves as a spacer with a U-shaped unbonded steel material insertion groove that opens on the upper edge, and a pair of cones and chucks that are attached to the unbonded steel material facing each other on both sides of the anchor plate. This is the point.
以下、図面に基いて本発明を具体的に説明する。Hereinafter, the present invention will be specifically explained based on the drawings.
第１図において、１は柱、２はスラブ、３ｉＩ′ｉアン
ポンド鋼材であって、このアンボンド鋼材３は図示され
ていないスラブ２の両端で定着きれている。In FIG. 1, 1 is a column, 2 is a slab, and 3iI'i is an unbonded steel material, and the unbonded steel material 3 is fixed at both ends of the slab 2 (not shown).
この図の場合、本発明によるアンボンド鋼材３の中間定
着点は４で示されており、この所ではアンボンド鋼材３
は負の曲げモーメントに対抗するためにスラブ２の上側
部を通っている。In this figure, the intermediate anchorage point of the unbonded steel 3 according to the invention is indicated at 4, where the unbonded steel 3
passes through the upper side of the slab 2 to counter negative bending moments.
第２図、第３図は中間定着点４の施工時における断面図
であり、図中、５はスラブ型枠、６は箱状型枠、７はス
ラブコンクリ−１・、８は中間定着具である。Figures 2 and 3 are cross-sectional views of the intermediate fixing point 4 during construction, and in the figures, 5 is a slab formwork, 6 is a box-shaped formwork, 7 is a slab concrete 1, and 8 is an intermediate fixing tool. It is.
本発明によりアンボンド鋼材３の中間定着を行う場合は
、先ず、スラブ型枠５内の所望位置（中間定着点４）に
、アンボンド鋼材３が貫通した状態で箱状型枠６を投首
し、スラブ型枠５内に箱状型枠６の内部を除いてスラブ
コンクリート７を打設するとともに、箱状型枠６内に露
出しているアンボンド鋼材３に中間定着具８を取付ける
。この際、中間定着具８を取付ける近辺では、アンボン
ド鋼材３０周面のすベシ材（例えば、グリース）は除去
する。When performing intermediate fixation of the unbonded steel material 3 according to the present invention, first, the box-shaped formwork 6 is placed at a desired position (intermediate fixation point 4) in the slab formwork 5 with the unbonded steel material 3 penetrated, Slab concrete 7 is cast inside the slab formwork 5 except for the inside of the box-like formwork 6, and an intermediate fixing tool 8 is attached to the unbonded steel material 3 exposed inside the box-like formwork 6. At this time, the surrounding material (eg, grease) on the circumferential surface of the unbonded steel material 30 is removed in the vicinity where the intermediate fixing device 8 is attached.
中間定着具８は、スペーサ兼用のアンカープレート９と
各１対のコーン１０ 、１０およびチャック１１゜Ｌｌ
から成り、この中、コーン１０ 、１０はチャック１１
の挿入口を反対向きにして、予めアンボンド鋼材３に嵌
挿しておく。The intermediate fixing device 8 includes an anchor plate 9 that also serves as a spacer, a pair of cones 10, 10, and a chuck 11°Ll.
It consists of a cone 10, 10 is a chuck 11
Insert it into the unbonded steel material 3 in advance with the insertion opening facing in the opposite direction.
アンカープレート９には上縁に開口するＵ形のアンボン
ド鋼材挿入溝Ｌ２が設けられておシ、このアンカープレ
ート９を図示のように直立状態でアンボンド鋼材３に取
付けてから、その両側にコーン１０ 、１０を当てがい
、チャック１１ 、１１を仮に挿入しておく。The anchor plate 9 is provided with a U-shaped unbonded steel material insertion groove L2 that opens at its upper edge.After the anchor plate 9 is attached to the unbonded steel material 3 in an upright state as shown in the figure, cones 10 are inserted on both sides of the anchor plate 9. , 10, and temporarily insert the chucks 11 and 11.
スラブコンクリート７が硬化したら、アンボンド鋼材３
を緊張するが、箱状型枠６の内法ｔは緊張時のアンボン
ド鋼材３の伸びを拘束しない長さにすべきである。Once the slab concrete 7 has hardened, unbond steel 3
However, the inner diameter t of the box-like formwork 6 should be set to a length that does not restrict the elongation of the unbonded steel material 3 during tensioning.
緊張したアンボンド鋼材３の端部をスラブコンクリート
に定着し、チャック１１ 、１１を打込むとともに、箱
状型枠６の内部にコンクリートを充填すれば、作業終了
である。The end of the tensed unbonded steel material 3 is fixed to the slab concrete, the chucks 11 are driven in, and the inside of the box-shaped formwork 6 is filled with concrete, and the work is completed.
本発明によれば、前述のようにしてアンボンド鋼材の中
間定着を行うので、アンボンド工法の特長を生かしつつ
、不慮の事故に対して安全性の高いスラブを施工するこ
とができる。そして、使用する中間定着具等も比較的簡
単なものであり、全体の作業性も良好であるから、経済
的である。According to the present invention, since the unbonded steel material is intermediately fixed as described above, it is possible to construct a slab that is highly safe against unexpected accidents while taking advantage of the features of the unbonded construction method. Further, the intermediate fixing device and the like used are relatively simple, and the overall workability is good, so it is economical.
第１図は本発明の対象であるスラブの説明図、第２図は
本発明による中間定着点の施工時における断面図、第３
囚は第２図のＸ−Ｘ線断面図である。
図中、２・・・スラブ、３・・・アンボンド鋼材、５・
・・スラブ型枠、６・・・箱状型枠、７・・・スラブコ
ンクリート、８・・・中間定着具、９・・・アンカーグ
レート、１０・・・コーン、１１・・・チャック、１２
・・・アンボンド鋼材挿入溝。
特許出願人 フドウ建研株式会社
代理人弁理士 染 谷 廣 司Figure 1 is an explanatory diagram of the slab that is the object of the present invention, Figure 2 is a sectional view of the intermediate fixing point according to the present invention during construction, and Figure 3
The figure is a sectional view taken along the line X--X in FIG. 2. In the figure, 2... slab, 3... unbonded steel, 5...
... Slab formwork, 6... Box-shaped formwork, 7... Slab concrete, 8... Intermediate fixing tool, 9... Anchor grate, 10... Cone, 11... Chuck, 12
...Unbonded steel material insertion groove. Patent applicant: Fudo Kenken Co., Ltd. Representative patent attorney: Hiroshi Sometani
Claims (1)
を除いてスラブコンク’Ｊ −トを打設するとともに、
前記箱状型枠を貫通しているアンボンド鋼材に中間定着
具を取付け、スラブコンクリートの硬化後、アンボンド
鋼材を緊張してその端部を定着し、それから前記箱状型
枠の内部にコンクリートを充填することを特徴とするア
ンボンド鋼材の中間定着方法。 ２）上縁に開口するＵ形のアンボンド鋼材挿入溝を設け
たスペーサ兼用のアンカープレートと、該アンカープレ
ートの両側において相対向してアンボンド鋼材に取付け
られる各１対のコーンとチャックから成ることを特徴と
するアンボンド鋼材の中間定着具。[Claims] 1) Placing slab concrete except for the inside of the box-shaped formwork installed at a desired position within the slab formwork,
An intermediate fixing device is attached to the unbonded steel material penetrating the box-shaped formwork, and after the concrete slab has hardened, the unbonded steel material is tensed to fix its ends, and then concrete is filled into the inside of the box-like formwork. An intermediate fixing method for unbonded steel material, characterized by: 2) It consists of an anchor plate that also serves as a spacer with a U-shaped unbonded steel material insertion groove opened at the upper edge, and a pair of cones and chucks that are attached to the unbonded steel material facing each other on both sides of the anchor plate. An intermediate fixing tool made of unbonded steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5555883A JPS59179965A (en) | 1983-03-31 | 1983-03-31 | Intermediate anchoring method and tool of unbond steel material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5555883A JPS59179965A (en) | 1983-03-31 | 1983-03-31 | Intermediate anchoring method and tool of unbond steel material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59179965A true JPS59179965A (en) | 1984-10-12 |
Family
ID=13002026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5555883A Pending JPS59179965A (en) | 1983-03-31 | 1983-03-31 | Intermediate anchoring method and tool of unbond steel material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59179965A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5781560A (en) * | 1980-11-05 | 1982-05-21 | Taisei Corp | Unbond prestressed concrete method |
-
1983
- 1983-03-31 JP JP5555883A patent/JPS59179965A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5781560A (en) * | 1980-11-05 | 1982-05-21 | Taisei Corp | Unbond prestressed concrete method |
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